Cotter-pin.



No. 339,337. Patented nec. I3, |393. A. n. ANTHONY.

CUTTER PIN.

(Application filed Mar. 9, 1898.) l

(No Model.)

rTnn STATES PATENT Ormea.

ALFRED ROVVAN ANTHONY, OF IWILKES-BARR, PENNSYLVANIA.

ooTTERr-PIN.- n l SPECIFICATION forming part of Letters Patent No. 639,337, dated December 19, 1899. Application filed March 9, 1898. Serial No. 673,261. (No model.)

To @ZZ whom t may concern:

Beit known that I, ALFRED Rowan AN- THONY, a citizen of the United States, residing at Wilkes-Barr, in the county of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in Cotter-Pins, of which the following is a specification.

My invention relates to improvements in devices for retaining removable heads or other Io fixtures on shafts. It is particularly designed for retaining links on the studs or pivot-pins of drive-chains, although it may of course be used for any analogous purpose.

In the accompanying drawings, which illustrate myimprovements, Figures l to 3, inclusive,are perspective views of different forms of my improved retaining device. Fig. lis a similar view showing the application ofv the de-v vice to a drive-chain stud; andFig. 5 is a crosszo section through the stud shown in Fig. 1l, taken directly in front of the retaining device.

As shown in Fig. l of the drawings, myimproved device comprises a pair of opposing arc-shaped arms 1, each unitedY by a reversely- 2'5 curved portion 2 to the head 3 of a split pin 3o face of the shank from the shoulder to the extremity S. The device is vformed from a single piece of spring metal. The arms l are wider than the curved connecting portions 2, so that they are comparatively rigid, while the parts 2 will yield when the arms are forced apart. The inner edges 9 of the arms are formed in the arc of a circle corresponding to the circumference of the part of the shaft or stud which they arc designed to embrace. The

4o two parts 5 of the shank are normally divergent toward the lower ends, so that they will have a tendency to spring apart when compressed. The line of separation between the two' parts of the shank may extend into an eye 10 in the head of the pin.

Referring toFigs. 4c and 5, which show my device applied to a drive-chain, 1l and 12 indicate links of a chain which are pivoted on a stud 13. The stud is provided with a cirthe shank spring apart and the shoulders 6 project beyond the walls of the perforation- 1G, so that the device cannot be removed except by rst compressing the two par-ts of the shank and then pulling the device outward with sufficient force to Overcome the tension of the spring-arms. The pointed ends of the two-part shank render its insertion into the perforation easy. preferably flat, and the portions projecting beyond the circumference of the stud form a fiat bearing-surface, against which a washer 17 or the fitting to be retained may rest, the device thus serving as a combined cotter-pin and collar.

In some cases the barbs or shoulders 6 may be dispensed with, as shown in Fig. 2, the de-y vice retaining all the other features of Fig. 1. In this case the device will be held upon the stud by the spring-clip and the divergent members 5 of the splitpin. In the form shown in Fig. 3 the central pin instead of being split is formed solid and without barbs or shoulders.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. The fastening comprising a split pin adapted to pass through a shaft and a pair of spring-arms made integral with said pin and arranged to encircle the shaft, substantially as described.

2. The combination with a split pin having normally-divergent barbed points, of a pair of spring-arms integral with said pin and adapted to encircle the shaft through which the pin passes, substantially as described.

3. The combination with a shaft having The arms of the clip are a diarnetrioal perforation and an annular In'testmony whereof I afx my signature groove, of a pin adapted to enter said perfoin presence of two Witnesses.

ration and a pair of comparatively riUid arms Y adapted to t in the annular groovem oppo- ALFRED ROW-AN ANTHONY' 5 site sides of the pin, said arms being connected Witnesses to the head of the pin by spring connections, B. C. HAIGHT,

l W. L. PARSONS.

substantially as described. 

